Uppermost Mantle Structure in the Middle East, Central Asia, Lake Baikal, and Far East from Pn Tomography and Sn Attenuation

Abstract

We have studied the propagation efficiencies of the Sn and Lg phases throughout China and produced summary maps. In addition, estimates of coda Q, Q for the Pn phase, and Q for the Lg phase for Tibet have been made. Sn has difficulty propagating across extended terrains in eastern China, the northern Tibetan plateau, and Mongolia. This makes it a difficult phase to use for nuclear monitoring purposes. Analysis of the Pn and Lg Q for northern Tibet show that partial melt both in the uppermost mantle and middle crust quickly attenuate these phases. Lg does propagate well over most of the rest of China, especially when it does not traverse major changes in crustal structure.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1997
Accession Number
ADA332812

Entities

People

  • Christopher Reese
  • James Ni
  • Richard Rapine
  • Thomas Hearn

Organizations

  • New Mexico State University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Asia
  • Central Asia
  • Continents
  • Earth Sciences
  • Eurasia
  • Frequency
  • Frequency Bands
  • Geography
  • Geology
  • Mongolia
  • New Mexico
  • Scattering
  • Secondary Waves
  • Southern Europe
  • Students
  • United States
  • Wave Propagation

Readers

  • Seismology